1663044433131 has 16 divisors (see below), whose sum is σ = 2226341761056. Its totient is φ = 1104226396416.

The previous prime is 1663044433121. The next prime is 1663044433151. The reversal of 1663044433131 is 1313344403661.

It is not a de Polignac number, because 1663044433131 - 2¹⁰ = 1663044432107 is a prime.

It is a super-2 number, since 2×1663044433131² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1663044433131.

It is not an unprimeable number, because it can be changed into a prime (1663044433121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 831351 + ... + 2004303.

It is an arithmetic number, because the mean of its divisors is an integer number (139146360066).

Almost surely, 2^{1663044433131} is an apocalyptic number.

1663044433131 is a deficient number, since it is larger than the sum of its proper divisors (563297327925).

1663044433131 is a wasteful number, since it uses less digits than its factorization.

1663044433131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174862.

The product of its (nonzero) digits is 186624, while the sum is 39.

Adding to 1663044433131 its reverse (1313344403661), we get a palindrome (2976388836792).

The spelling of 1663044433131 in words is "one trillion, six hundred sixty-three billion, forty-four million, four hundred thirty-three thousand, one hundred thirty-one".